Ok so my wife likes penetrating sex but also likes me locked and the whole cuckholding isn't going to work. So I was wondering how these hollow strap-on work. How hallow are they? I'm not small or have issues just looking for info on alternative means of satisfying my KH.
First of all find out what she means by 'bigger'. That may mean more girth as well as length. Lots of women don't really feel additional length like they think they would. And find out (or tell us if you know?) whether it's something she wants to explore, or whether it's actually something she's genuinely frustrated about already. The best kits I've heard of involve casting a latex extension around your erection. That's kind of why you have to know what you're shooting for (in this case, aiming for, since you won't be shooting, will you?).